Foundation – Chain and odd number of stitches.
Row 1 – 1 single crochet in 2nd chain from hook, 1 single crochet in each stitch across, chain 1 and turn. The stitch count for this row will be an even number of stitches, one less than what you started with in the foundation chain.
Row 2 – Front post single crochet (fpsc) around each stitch to the end, this will end up being an uneven number (one less than row 1), then make 1 single crochet into the chain 1 stitch of the previous row, chain 1, and turn. The stitch count will be the same number as row 1.
Row 3 – 1 single crochet in each stitch to the end, the last stitch to be made in the chain 1 of previous row, chain 1, turn. The stitch count will be the same as row 1.
Keep repeating rows 2 and 3.